this specific thermostatic expansion valve is calibrated only for R-22 refrigerant

heat stress on the diaphragm

like a heat exchanger failure

it addresses common failure points such as plunger fatigue or seat degradation

and general-purpose heating systems

Johnson Controls VA7810-AGA-2 Actuator 318518-761 this specific thermostatic expansion valveThe Johnson Controls VA7810 AGA 2 is a heavy duty non spring return actuator designed for the precise control of VG7000 Series bronze globe valves. Operating on 24Vac power, this unit delivers 180 lb in torque to manage flow in high demand HVAC systems. This specific model supports both two position and floating control, providing flexibility for diverse automation sequences. With a 5 16" to 1" stroke range, it ensures accurate valve positioning for